Sensor node, base station, and sensor network system
First Claim
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1. A sensor network system, comprising:
- a sensor node comprising a first sensor configured to detect at least one of data of a temperature, acceleration, and illuminance, a first CPU for receiving first data which is at least one of data of a temperature, acceleration, and illuminance detected by the first sensor, a first memory in which software executed by the CPU is installed, a first wireless communication module for transmitting the first data obtained by the first sensor, and a first interface controller; and
a base station comprising a second wireless communication module for receiving the first data transmitted from the first wireless communication module of the sensor node, a second memory for storing the data to be transmitted to the sensor node, a second CPU for controlling the data stored in the second memory to be transmitted to the sensor node, a second sensor configured to detect at least one of data of a temperature, acceleration, and illuminance, and a second interface controller, whereinthe first sensor, the first CPU, the first memory, the first wireless communication module and the first interface controller are connected through a first bus, andthe second sensor, the second CPU, the second memory, the second wireless communication module and the second interface controller are connected through a second bus,wherein the base station has a third memory which is connected through an interface to the second memory and stores commands to be transmitted to the sensor node,the second memory stores a portion of the commands stored in the third memory, andwhen the base station receives the first data from the sensor node, if the command to be transmitted to the sensor node is stored in the second memory, the command stored in the second memory is transmitted to the sensor node.
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Abstract
This invention achieves lower electric power consumption of a sensor node for carrying out an intermittent operation, in a sensor net system. A time when the sensor node transmits a signal to a base station is estimated. Then, in accordance with the estimation, a table for storing a signal transmitted from the sensor node is installed in a wireless section of the base station. Consequently, a communication time between the sensor node and the base station can be made shorter. Also, a start time of a micro computer is set for RTC inside the sensor node, so the micro computer inside the sensor node can be put in the standby state.
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Citations
9 Claims
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1. A sensor network system, comprising:
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a sensor node comprising a first sensor configured to detect at least one of data of a temperature, acceleration, and illuminance, a first CPU for receiving first data which is at least one of data of a temperature, acceleration, and illuminance detected by the first sensor, a first memory in which software executed by the CPU is installed, a first wireless communication module for transmitting the first data obtained by the first sensor, and a first interface controller; and a base station comprising a second wireless communication module for receiving the first data transmitted from the first wireless communication module of the sensor node, a second memory for storing the data to be transmitted to the sensor node, a second CPU for controlling the data stored in the second memory to be transmitted to the sensor node, a second sensor configured to detect at least one of data of a temperature, acceleration, and illuminance, and a second interface controller, wherein the first sensor, the first CPU, the first memory, the first wireless communication module and the first interface controller are connected through a first bus, and the second sensor, the second CPU, the second memory, the second wireless communication module and the second interface controller are connected through a second bus, wherein the base station has a third memory which is connected through an interface to the second memory and stores commands to be transmitted to the sensor node, the second memory stores a portion of the commands stored in the third memory, and when the base station receives the first data from the sensor node, if the command to be transmitted to the sensor node is stored in the second memory, the command stored in the second memory is transmitted to the sensor node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification